Oliver is creating an image of a fruit basket. from the basket, he wants the red apples to stand out among the rest so they will catch attention. what can oliver do to achieve this effect?
oliver can increase the blank
of the apples to enhance them and make them stand out from the other fruit.

saturation

Explanation:

If Oliver increases the saturation of the apples.  Increased saturation will make the colors more intense, they will look move vivid and will clearly stand out from the rest.

One way to do it is to select the apples then, depending on the program he's using, could increase the saturation directly, apply a filter or create a new layer to boost the saturation of the apples.